Improvement in machines for making plow-irons



J'NITED A S PATENT Orrxcn.

JAMES M. MCGINTY AND THOMAS NOLAN, 0F MOULTON, TEXAS.

IMPROVEMENT IN IVlACHlNE S FOR MAKING PLOW-lRONS.- I

Specification forming part of Letters Patent N0. 136,444, dated March 4, 1873.

To all whom it may concern:

' Be it known that we, JAMES M. MOGINTY and THOMAS NOLAN, of Moulton, in the county of Lavaca and State of Texas, have invented a new and useful Improvement in Machine for Forming Plow-Bars,.of which the following is a specification:

Figure 1 is a front view of our machine. Fig. 2 is a side view of the same, showing the dies. Fig. 3 is a vertical detail section, taken through the line y y, Fig. 2. Fig. 4 is a horizontal detail section, taken through the line :v as, Fig. 2. Fig. 5 is a View illustrating the method of cutting the plow-bars from the bar or plate.

' Similar letters of reference indicate corresponding parts.

1 Our invention has for its object to furnish an improved machine for forming plow-bars which shall be simple in construction, convenient in use, and effective in operation, producin g better bars at much less expense than when made by hand in the ordinary manner; and it consists in the combination of the driving-shaft, driving-wheel, segmental gearwheel, intermediate gear-wheel, feed-roller g'earwheels, feed-rollers, crank or crank-wheel, and connecting-rod with each other and with the dies, for the purpose of operating said dies and feeding the bar or plate to them; in the dies provided with punches, spring-lifting bars and stops; and in the method of cutting the plow-bars from the bar or plate to avoid waste of stock and enable one set of dies to out two plow-bars at each operation, as hereinafter more fully described.

A represents the frame-work of the machine, in bearings in the upper part of which revolves the shaftB, to which is attached the driving pulley or wheel 0, to which the power is applied. To the shaft B is also attached asegmental cogwheel, D, the cogs and blank space being so arranged that the bar or plate to be cut will be fed forward the required distance, and then allowed to be stationary while the dies are operating. The teeth of the segmental gearwheel D mesh into the teeth of the gear-wheel E attached to the shaft F that revolves in hearings in the frame. The teeth of the gearwheel E also mesh into the teeth of the gearwheel G formed upon or attached to the upper feed-roller H. The teeth of the gear-wheel G mesh into the teeth of the gear-wheel I attached to the lower feed-roller J. As the bar or plate from which the plow-bars are to be cut is fed forward by the rollers H J, it passes along the table K, between the guides L attached to said table, and which keep the said bar or plate in proper position to be operated upon by the dies. M is the lower or stationary die, which is secured to the table K. N is the upper or movable die, which slides up and down in ways 0 attached to the frame A. The die N is moved by the connecting-rod P, the lower end of which is pivoted to said die N, and its upper end is pivoted to the pin of a crank or'crank-wheel, Q, formed upon or attached to the end of the shaft B. The dies M N are so formed as to form two plow-bars at each operation. Each die is provided with two punches, R, to form the holes in the plowbars. Each die is provided with holes to receive the punches of the other die, and which extend out to carry off the plugs. The plowbar is lifted off the punches of the lower die by two pivoted bars S, which are provided with springs T to raise the plowbar, and which are so arranged that they cannot raise the plow-bar above the level of the table K, so that it may be pushed. from the machine by the bar as it is fed forward by the rollers H J. The plow-bar is held while the upper punches are withdrawn by a stop or stops, U, attached to the frame A, and. which, when the upper die descends, enter a notch in it, as shown in Fig. 3. The piece cutout between the curved edges of the bridges is held down when the upper die rises by two stationary pins or stop-rods, V, attached to the frame A, and which pass down through holes in the upper die N. The plow-bars are cut from the bar in the manner shown in Fig. 5, so that there is scarcely any waste of stock.

When the die N descends the first time after a bar is fed into the machine it forms the whole of one plow-bar and all the second one but separating it from the bar. The second time the die N descends it cuts 0E the second plow-bar, wholly forms the third, and forms the fourth all but cutting it from the bar, and so on until the bar is cut up.

Having thus described our invention, we

claim as new and desireto secure by Letters as herein shown and described, and for the Patentpurpose set forth.

1. The combination of the driving-shaft B, 3. The method of cutting the plow-bars driving-wheel O',segmental gear-wheelD, gearfrom the bar or plate to avoid waste of stock wheelE,feed-rol1ergear-wheelsGI,feed-ro1lers and enable one set of dies to out two plow- H J, crank or crank-wheel Q, and connectingbars at each operation, as set forth. rod P,'with each other and with the dies M JAMES MCGINTY. N, substantially as herein shown and described, THOMAS NOLAN for the purpose of operating said dies and feeding the bar or plate to them, as set forth. Witnesses:

2. The dies M N, provided with punches R, ROBT. H. MOGINTY, spring-bars S T, and stops U V, substantially I. D. DUNEVANT. 

